INCOME TAXES Tax reform (Details) $ in Millions	9 Months Ended
Dec. 31, 2017 USD ($)
Income Tax Disclosure [Abstract]
TaxCutsAndJobsActOf2017IncomeTaxExpenseBenefit	$ 10.5

Amount of income tax expense (benefit) from effect of Tax Cuts and Jobs Act of 2017

No definition available.

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Namespace Prefix:	wrld_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration